DALLAS (CBSDFW.COM) – As temperatures remain well below freezing on Saturday morning, more than 130,000 customers remain without power in North Texas.

Oncor estimates that power will be restored to nearly all customers by Sunday evening.

Despite restoring power to more than 140,000 people in less than 24 hours, the company says icy conditions and dangerous roads have significantly slowed the crews’ progress.

The company says it has increased its workforce by nearly 50 percent, or 1,200 personnel, by bringing more contractors and employees from other utilities to assist in repairs.

“We know this is a very difficult time to be without power and we appreciate customers’ patience as we work to restore their service. We continue to call on additional resources to assist with restoring power around the clock until everyone is restored, and this winter emergency is over,” said Jim Greer, Chief Operating Officer for Oncor.”Our employees and personnel from across Texas and out of state are committed to restoring power to those customers as quickly as possible, which is why we believe nearly all customers can be restored by Sunday night.”

Greer says customers should use extreme caution if they see a downed or damaged power line.

“Customers should keep their families and pets away and immediately call 911 if they see a downed power line,” said Greer.

Customers without power are encouraged to notify Oncor on its 24-hour outage hotline at 888.313.4747, text OUT to 66267 or report outages online.